Decisions decisions.

I can put asi into Dex to improve my AC by 1, my dex saves by 1, my hit and damage rolls with my offhand crossbow by 1 each, dex scaling skills by 1, and my initiative by 1. I'm using the ring of elemental infusion alongside the gloves that add stacks of frost whenever you deal cold damage, so hitting with the crossbow every turn is actually pretty beneficial so this one seems the best option. I stack 6 stacks of covered in frost in a single turn by hitting with ray of frost then shooting with my offhand elemental infused crossbow, it's pretty sweet. Haste can make it so I proc the frost stacks with another ray in the same turn if I need to.

Or I can put asi into Con to give me 12 more max hp, +1 to my concentration checks, and +1 to Con saves.

Or the one that is probably the most fun, which is the dual wielder feat, so that I can hold two staffs. I'm doing the ice build, so having both Mourning Frost and Markoheshkir at the same time is always nice. The only downside of this option is that it looks kind of stupid.

I'm also really looking forward to going to razimath's tower to get the robe of the weave so I can wear a nice robe instead of this mismatched clown outfit. I wish there were some cool wizard boots that fit the ice theme. I usually use the boots of stormy clamour on this build but these bonespike boots are +1 to ac and +1 to saves which is generically good too.

Ice wizard is my all time favorite build in this game and it's always a fun comfort pick. I love this game!